Sandpaper belting.



G. H. DRIVER. SANDPAPER BELTING.

APPLICATION FILED FBBA, 1914.

1,126,423, Patented Jan.26,1915.

Witnesses details of construction hereinafter described CHARLES H.DRIVER, 0F RACINE, WISCONSIN, ASSIGNOR TO C. H. DRIVER & KERR. (10.,

' 0F RACINE, WISCONSIN.

SANDPAPER BELTING.

Specification of Letters Eatent.

Patented J an. 26, 11915.

To all whom it may concern:

Be it known that 1, CHARLES H. DRIVER, a citizen of the United States,residing at Racine, in the county of Racine and State of Wisconsin, haveinvented a new and useful Sandpaper Belting, of which the following is aspecification.

The presentinvention aims to provide, as

provide a process whereby a strip of abra-' sive material may be adaptedfor use in the formation of a sand belt so called.

It is within the scope of the invention to improve generally, theconstruction of sand belts, and to improve processes whereby a strip ofmaterial is adapted for use in the formation of a sand belt.

With the above and other objects in view which will appear. as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the and claimed, it being understood thatchanges in the precise embodiment of the invention herein disclosed canbe made within the scope of what is claimed without departing from'thespirit of the invention.

In the accompanying drawing':Figures 1, 2 and 3 are longitudinalsectional views illustrating various steps in the manufacture of a sheetof abrasive material for use in a sand belt; Fig. 4 is a perspectiveshowing a strip of material disposed in roll form; Fig. 5 is aperspective showing a detached strip having its ends united to form abelt; Fig. 6 is a fragmental longitudinal section illustrating indetail, the appearance of the ends of the strip at the point of joining;Fig. 7 is a longitudinal sectional view showing a modified form of theinvention.

In the accompanying drawing, the numeral 1 indicates generally a stripof sand i pitper. In this connection, the word sand is to beconstrued asmeaning any abradant and the wordf'f paper is to be construed as meaningany flexible substance to which an abrad'ant may be attached.

The sheet of. sandpaper comprises a flexi ble body 2 carrying anabrasive indicated at? The sheet or strip may be of any de- SIIGd lengthand originally appears as shown 1n Fig. l of the drawing. In theabrasive face of the strip there is formed a recess 4 definlng a bevel 5in the body 2 and defining bevels' 6 and 7 in the abradant 3, thearticle then appearing as shown in Fig. 2.

In the under face of the strip and more specifically in the body 2 thereis formed a recess 8. This recess 8 overlaps the recess 4 longitudinallyof the strip.

2 By the operation above described, a bevel '9 will be formed in theunder face of the body portion 2 of the strip, the article now appearingas shown in Fig. 3. It is to be observed that by the process as thus farcarried out, the strip is thinnest as indicated at 10, at a pointadjacent the bevel 7 The concavities above referred to extend entirelyacross the strip of material and are formed at intervals. Ordinarily,the strip, having been cut away upon its opposed faces at spacedintervals, as shown in Fig. 3, is formed into a roll 11, as depicted inFig. 4. The article is now in condition for sale.

The user, having before him the roll 11, unwraps therefrom a portion ofthe roll, and tears ofl a section at the point 10. Since this point 10is adjacent one edge of the abradant 3, which edge may be taken to berepresented by the bevel 7, it may be observed that the abradant at thispoint serves to stiffen the strip and facilitates the tearing ofi of thesection. After a section has been detached from the roll 11, the ends ofthe section are brought together to form a belt as shown at 12 in Fig.5, the bevel 9 beingoverlapped upon the bevel 5 as shown in Fig. 6, thebeveled faces 5 and 9 being cemented together or otherwise secured toform the joint 14 in the belt 12. By the operation above described thebelt is of approximately the same thickness at the joint as elsewhere.Further, owing to the formation of the bevels 6 and 7 in the abradantthere is no abrupt joint where the ends of the section are broughttogether to complete the configuration of the belt as shown in Fig. 5.

The importance will be readily understood when it is noted that thepurchaser desiring a sand belt merely unwraps a section from the roll,tears ofi' the section, andunites the beveled ends,

it being unnecessary to scarf, pare or otherwise operate mechanicallyupon the ends of the section, in order to obtain a satisfactory joint.Although the concavities 4 and 5 are shown as of straight lineconfiguration, longitudinally of the belt, it will be understood readilythat the concavities may be varied in outline, Figs. 2 and 3 beinglargely.

the strip are indicated at 29. It is at these points 29 that the stripis severed. In the of the present invention form of invention underdiscussion, a comparatlvely short plece of waste mater1al 1ndicated at30 results.

Having thus described the invention, What is claimed is 1. As an articleof manufacture for use in the formation of belts, a strip of abrasivematerial having spaced pairs of concavities extended thereacross atintervals, the concavities of the respective pairs being formed inopposed faces of the strip. 1

2. As an article of manufacture for use in the formation of belts, astrip of abrasive material having concavities extended entirelytliereacross, at intervals, the concavities being spaced from each otherto define belt lengths and certain of the .concavities lying between theends of the strip to facilitate the separation of a belt length from thestrip.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

CHARLES H. DRIVER.

WVitnesses RALPH T. INGAIZLS, WALLACE INGALLS.

